Aquatic Arts 10 Black Rili Shrimp (Neocaridina davidi - 1/2 to 1 Inch Long) All Aquatic Arts (formerly InvertObsession) brand plants and animals come with a 100% live arrival guarantee, plus free email support directly from the owners! These ship out as breeding age young adults that range from 1/2 to 1 inch in length. Dwarf shrimp are very small and are not ideal for aquariums with medium to large-sized fish. Please research dwarf shrimp before purchasing to ensure compatibility with your tank's inhabitants. Black Rili Shrimp feature a striking black and white coloration, with the white parts often appearing translucent. A colony of shrimp works as a very effective cleaning crew for your tanks, cleaning up algae and waste!